FeaturedDeveloper
API Request Builder
Compose API requests with headers, query params, and body templates for faster testing workflows.
OpenFree tools
Browser-based utilities for daily frontend work. No sign-up, no ads.
FeaturedCSS
Color Palette Generator
Generate harmonious color systems with CSS variables, swatches, and contrast-friendly variants.
OpenFeaturedDeveloper
JSON Formatter and Validator
Format, minify, and validate JSON with instant error feedback.
OpenFeaturedSecurity
JWT Decoder
Decode JWT header and payload to inspect claims quickly in the browser.
OpenFeaturedDeveloper
Regex Tester
Test regular expressions against sample text and inspect match groups.
OpenFeaturedEncoding
UTM Link Builder
Build campaign-ready URLs with UTM parameters, presets, and share-ready output.
OpenSecurity
Advanced Password Generator
Generate high-entropy passwords with charset controls and ambiguity filters.
OpenEncoding
Base64 Encode/Decode
Encode and decode UTF-8 text quickly with one-click copy actions.
OpenCSS
CSS Border Radius Generator
Generate border-radius values visually with linked and independent corner controls.
OpenCSS
CSS Box Shadow Generator
Create layered box-shadow values visually with instant CSS output.
OpenCSS
CSS Clamp Calculator
Generate fluid typography and spacing values with CSS clamp().
OpenCSS
CSS Gradient Generator
Create linear, radial, and conic gradients with live preview and copy-ready CSS.
OpenDeveloper
cURL Command Builder
Generate cURL commands from method, headers, auth, and JSON body with safe escaping.
OpenSecurity
Hash Generator and Verifier
Generate MD5, SHA-1, SHA-256, and SHA-512 for verification workflows.
OpenEncoding
HTML Entity Encode/Decode
Convert special characters to HTML entities and decode entities back to text.
OpenDeveloper
Lorem Ipsum Generator
Generate placeholder text by words, sentences, or paragraphs.
OpenDeveloper
Markdown Table Generator
Convert CSV-style data into clean Markdown tables with alignment and quick copy output.
OpenDeveloper
Open Graph Meta Generator
Generate Open Graph and Twitter meta tags with social card preview and copy-ready output.
OpenDeveloper
Robots.txt Generator
Generate a starter robots.txt with sitemap and crawler directives.
OpenDeveloper
Slug Generator
Create clean URL slugs from titles with instant normalization.
OpenDeveloper
Unix Timestamp Converter
Convert Unix seconds timestamps to ISO dates and back instantly.
OpenEncoding
URL Encoder/Decoder
Encode or decode URL-safe strings instantly for query and path debugging.
OpenDeveloper
UUID Generator
Generate UUID v4 values for IDs, fixtures, and API test data.
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